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Patent US2622684A successfully refreshed from Google Patents.
US2622684A
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Rib type casing centralizer
Assignee: Individual
•
Filing: 1950-01-26
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Granted: 1952-12-23
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Expires: 1970-01-26
Abstract
No abstract record available.
Inventors
- 👤 Kluck Louis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:08
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1078; E21B33/00; E21B33/10; E21B33/13; E21B33/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-23 | 1956-06-23 | 1956-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-23 | 1960-06-23 | 1960-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-23 | 1964-06-23 | 1964-12-23 | $7700.00 | Window Closed / Lapsed |